Pencil Test https://you.stonybrook.edu/334jxia/files/2023/04/working2.mp4 https://you.stonybrook.edu/334jxia/files/2023/04/walking2.mp4 https://you.stonybrook.edu/334jxia/files/2023/04/working1.mp4 https://you.stonybrook.edu/334jxia/files/2023/04/walking1.mp4